It has been hypothesized that blastocyst stage ET would permit the identification of embryos that could maintain their developmental process and, thus, allow the recruitment of good quality embryos with enhanced developmental ability Therefore, it has been suggested that the blastocyst transfer
at day 5 would succeed the highest pregnancy rates with the least number of embryos (5-7).
Progesterone rise on the day of human chorionic gonadotropin administration impairs pregnancy outcome in day 3 singleembryo transfer, while has no effect on day 5 single blastocyst transfer
Trophectoderm morphology: an important parameter for predicting live birth after single blastocyst transfer
Although a comparison of the incidence of ectopic pregnancy between cleavage stage transfer and blastocyst transfer
has not been the specific subject of any prior study in the literature, information on this issue can be found in a report by Marek et al.
Single blastocyst transfer
(SBT), widely used in Europe, guarantees a reduction in multiple births, the biggest problem facing fertility specialists worldwide.
He presented a 3-year retrospective study that examined live birth rates and twinning rates among 103 patients who had single blastocyst transfer
(SBT) and 290 who had double blastocyst transfer
The chance of pregnancy increases from 12 to 15 per cent using current techniques to 25 to 30 per cent of women who use blastocyst transfer
," said Dr Steward.
Sherbahn believes that the increased use of blastocyst transfer
(when the embryo is at a later stage of development) has allowed his IVF program to select higher quality embryos in comparison to traditional Day 3 (cleavage stage) transfer, when embryo quality is less certain.
2012) assessed 2150 blastocyst transfer
cycles which illustrated more pregnancy rate in frozen-thawed group, because of hormonal stimulation as the factor reduces embryo acceptance capacity of endometrium, (11) and also, Chunjuan et al.
Comparison of blastocyst transfer
with and without preimplantation genetic diagnosis for aneuploidy screening in couples with advanced maternal age: a prospective randomized controlled trial.
2) Before the mid-1990s, low production and accompanying low viability of blastocysts during human IVF due to the inability of any single culture medium to meet and sustain the changing nutritional requirements of preimplantation embryos resulted in blastocyst transfer
More than half the women in a retrospective study became pregnant after undergoing the procedure, called a single blastocyst transfer
, which transferred just one embryo into the womb.
In our study, serum E2 level was estimated on the day of blastocyst transfer
, which is 7 days after OI.
David Gardner at Colorado Center for Reproductive Medicine in the USA introduced a serum-free medium for blastocyst transfer
and culture (80).
also can boost pregnancy rates in women who have failed to become pregnant after undergoing at least three traditional in vitro fertilization (IVF) procedures, reported investigators in a second study.